Bar and sheet heating furnace



March 10. 1925 G. J. HAGAN BAR AND SHEET HEATING FURNACE 2, 19225 3Sheets-Sheet 1 Filed my FIG 1 y mv ENTOR film? /PJ .fl/LU j ATTORNEYMarch 10, 1925 1,529,619

y 5. J. HAGAN BAR AND SHEET HEATING FURNACE Filed July 2, 1923 5Sheets-Sheet 2 lNVENTOR MMM@ ATTO RN EY March 1o. 1925 G. J. HAGAN BARAND SHEET HEATING FURNACE Filed July 2, 1923 3 Sheets-Sheet 3 FHS. 5

NVENTOR ATTORNEY Patented Mar. 10, 1925.

UNITED .'S'flAES 'PATENT FsFl-CE- GEORG-E J'. HAGAN. OF -PERBYSVILLEPENNSYLVANIA. ASSIGNOR TO GEORGE J'.

HAGAN COMPANY. F PITTSBUBGH. PENNSYLVANIA, A .CORPORATION .0F PENN-SYLVAN IA.

BAR am) SHEET Hnazrme FUBINACE.

T 0 all @from t ,may ,concer/z:

BeA it known 'that IfGporor-L J. HAGAN, residing at Perrysville. in thecounty of Allegheny and State of ,Pennsylvania a citivzenof the UnitedStates, have'i'nvented or discovered .certainnew and useful Imlu'ove-4ments in j,ar and Sheet Heating 1l`urnaces.` of ,which yimprovenients`,the `t'ollowipg is a specification.

The invention ,described herein relates to certain `inliprovements'I inv),iueating furnacesy employed in the manufacture of sheets and theinventionhas for itsobject the combination of a combustion chamber orlire'box l connected with a portion orportions adapted for the heating.of vbars and Ialso with a portion adapted for the heatingmof sheetswith means for regulating the ow of products `of combustion `to therespective portions. The invention is hereinafter more fully describedand claimed.

In the accompanying drawings forming a part of this specification,Figure 1 is a sectional plan view of a furnace embodying theimprovements claimed herein;

Figure 2 is a sectional elevation, the plane of section being indicatedby the line II-IL Figuie 1;

Figures 3 and 4 are views similar to Figures 1 and 2 showin(r anotherembodiment of the invention; and

Figure V is a top plan view of the furnace shown in Figures 3 and 4.

In the practice of the invention the furnace is so constructed as toprovide two heating chambers, one of the heating chambers, as 1, beingespecially adapted for the heating of sheet-bars and the chamber 2 forthe heating of sheets, either in packs orin singles. These chambers arepreferably arranged side by side and have a common side wall 3 whichalso forms one of the side walls of the combustion chamber of fire-box4. While a stoking mechanism 4 is Shown for the supply of fuel to thecombustion chamber, other forms of fuel, liquid or gaseous, may beemployed. One end of the chamber l is provided with a door and withmechanism 5 for feeding bars into and through the chamber which is alsoprovided with a door 6 at its discharge end. The chamber 2 is providedwith a door 7 for charging and removing of material, the doors and 'Tbeing arranged at the same end of the furnace. The combustion chamber 4is connected to 1923A rSerial No. 649,009.

'is connected at its upper end to the flue`13 leading yto the stack. Asuitably arranged damper `is provided for controlling the How yofproducts lof combustion through ythe chamber; In lthe 1constructionyshown a damper 1st arranged in the flue 13. The products of combustionpass from the sheet heatingchaniber through ports -lfconnected toA dues1,6 which in turn are connected to acommontlue 1,7, passing under 'theheatingr chamber. This flue iscon'nected at its end to up-take llues 18which in turn are connected to flues 19 leading to the stack, and in theflue 19 is arranged a damper Z0 for regulating the flow of products ofcombustion from the sheet heating chamber.

In lieu of providing only one pair-heating chamber, it is preferred thattwo such chambers 13- should be employed and arranged on opposite sidesof the sheet heating chamber 2. These pair-heating chambers are extendedbeyond the sheet heating chamber and intermediate of these extensions`and in the rear of the sheet heating chamber is arranged the combustionchamber 4f. In this construction products of combustion pass from thecombustion chamber 4a over the bridge wall J into the sheet heatingchamber and thence through ports 15Cl and flucs 16a, 17a, 1Sa and 19 ashereinbefore described, to the stack. The pair-heating chambers areconnected to opposite sides of the combustion chamber by ports 8 and theproducts of comlguistion escape from the front portions of thepair-heating chambers through ports 10a, flues 11a, 12a and 13 to thestack, and the flow of the products of combustion is controlled bydampers 14a as hereinbefme described, in connection with theconstruction shown in Figures 1 and 2.

It will be observed that in theccnstruction shown and described herein,the flow of the products of combustion and i nsequentl} the amount ofheat passing through pair and sheet heating chambers can be properlyproportioned so as to properly heat the charges "in the respectivechambers.

As a general thing, the quantity of material in the pairheating chambersWill be greater than that in the sheet heating chamber and the areaexposed to the action of the products of combustion will be less andhence a higher temperature should be maintained in the pairheatingchamber or chambers than will be required for heating the sheets whichhave the larger exposed area, in the sheet heating chamber or chambers.

l claim herein as my invention:

1. A furnace having in combination a combustion chamber, a sheet heatingchamber communicating at one end with the combustion chamber and havinga vcharging and discharging opening at its opposite end, an open endedbar heating chamber communieating with the combustion chamber, means formoving bars through said chamber, flues or passages for conductingproducts of combustion from therespective heating chambers, and damperswhereby the flow of products of combustion through the respectivechambers may be independently regulated.

2. A furnace having in combination a combustion chamber, a Vsheetheating chamber communicating at one end with the comdischarging openingat its opposite end, a bar heating chamber arranged along. side of' thesheet heating chamber and having openings at its ends, means for feedingbars through the chamber, a port or passage connecting the combustionchamber to the heating chamber at a point adjacent to the end at Whichthe bars are charged, iues or passages communicating With the respectiveheating chambers at points adjacent to their discharging ends anddampers adapted to regulate the HOW of products of combustion throughsaid chambers.

3. A` furnace having in combination a sheet heating chamber, bar heatingchambers extending along opposite sidesv of the sheet heating chambers,a combustion chamber in the rear of the sheet heating chamber andintermediate the bar heating chambers, and connected to the sheet andbar heating chambers, a stack, independent Iflues extending from theseveral heating chambers to the stack and dampers adapted to regulatethe flow of products ofcombustion through the several chambers.

In testimony whereof, I have hereunto set my hand.

(TWITRQTP. T T-TA GAN

